Apparatus for washing ore.



H. A. BRAGKELSBERG.

APPARATUS FOR WASHING ORE.

APPLICATION FILED JULY 2, 1913.

1,@80,886 Patented Dec. 9, 1913.

yaw/M7 2 1 W APAEATUS FOB V/ASHING ORE;

Specification of Letters Patent.

Patented i) :6. 191.).

Application filed July 2, 191.3. fierial No. 778,980.

To all iii/1.0377, it may concern:

lle it. known that l, lliiltMANN ALEXANDER hutntcrsnnatr a subject oft the Gern'ian Einperor, and itnltitlil ot Karlstrassc 1, Hagen.

tier-many. have invented certain new and useful .lniprtwenients ill Apparatus tor Washing (hr. of which :the' following is a li tinrention retates to apparatus tor washing ore by the well known method of i: nting oti' the ganoue. in some instances t, or the like is added so as to render the sultitl rmrthlcs capahle of floating, or the dry ore is spread on a .water surface. With the last llititllOtl good results are obtained only when the particles are separately or loosely delivered on the water surface at a correct angle thereto. For this purpose it is necessary to constantly renew the. surface of the water. to deliver the particle separately and prevent their lloati gr tog't her or coming against any obstacle on the surface of the water. Various devi es have previously been adopted for fulfilling either the one or the other condition. but no means have been able to satisfy all the requirements.

it is the object of my ii'ivention to provide an apparatus which is capable of elt'ectina' complete separation of the metallic p: from the angue and the delivery of each constituent into separate collecting spaces, whereby unavoidable middle product is obtained which can he subsequently treated.

This improved apparatus consists in an arrangement wherein the ore freely discharged from a st'tpcrposed hopper onto adistributing: device (cone-surface) along which it descends and spreads onto a lower (mic-surface where it. becomes moistened and further scattered after which it. drihbles into the overflow separators. one alter another,

for dividing and collecting the diiierent sorts of constituents as sediments while the Qangue [lows oil vviththe tail water through a. rhannel connected with the last separator.

The apparatus is shown in sectional elevation. by way of example. in the aeeo1n1ninyin drawing.

The frame '1 iHlH bearings Q and i for a vertical shat't -.l whi h is partly bored out as at 5. 0n the upper portioirot the shaft 1 is mounted a rotary sleeve (3 with cone T and said sha'lt -'lis rotated through the intervention of the hcrel gear wheel-v S and 8. Around the cone T is placed a hopper 5) and the gap between. the cone 7 and hopper 9 can be adjusted to various degrees by means of a nut 10 screwed upon a threaded portion of the sh aft 1- so as to press against the nave of the wheel 8 Beneath the lower end of the cone 7 and its surrounding hopper 9 is fixed on shaft e: a distributing cone 11 which partially 0 tends into the cone 7 and which serves also as a water-container. The i terior ot the distributor i1 coinnninica with the bore 5 of the shaft i and rec water from the latter from the supply p re The bottom portion of the distributor 1.1. has a plurality of holes 11 near the periphery from which the water runs in lin the internal upper portion of said d ...-ihtuer oroviding an air cushion.

The lower edge oi the. (llSllllHllTQl tends over cone-shaped spreader 13 which is also fast on the shaft 4:. The water from the distrihnter forms a sheet of water over the surface of the spreader i3 and runs oil uniformly at the lower edge thereof. The dry raw material from the hopper 9 falls onto the distrihuter 11 and delivered. onto the running water of the spreader 13 where it. becomes moistened and scattered apart.

r'tround the soherical head of the foot; hearing 2-3 of the shaft l: is mounted the lower cylindrical portion of a funnel-shaped overliow separator 1 which is so arri nged that the upper edge projects a little above the lower edge or the distrihuter 13, screws 15 being provided for accurately leveling said upper edge. On the exterior of the cylin tirical portion conveniently near the lower end of the seoarator l l lined a sphericallyheaded fitting 16 for sustaining a second tunnel-shaped overflow separator 17. the upper rim of which is lower than that of the separator 14 and can be horizontally ad just'ed by means of screws 18. The separator 17 is fitted with an outer vessel 19 having an upper cylindrical portion and a lower conical portion. The rim of the vessel 15') is lower than that ot the sei iara or 1i and is fitted with a circular discharge cl annel 20. Between the separator 14 and vessel 19 there is provided a funnel 21 open at top and bottom forming a circular conical space around the SQIMILtIl'Ul 1? which at the lower end opens freely into the vessel 19. while the upper rim of said funnel 21 projects above that of 19 but lies below that of 17.

The operation is as ifollowsz The water supplied through the pipe 12 and bore 5 into th distributor l1 ctnnpresses the air in the latter so as to provide an air cushion which regulates the outflow from the perforations ll to a steady uniform film over the entire surface of the spreader 13 from which it runs off into the separator 14- in a radial direction and slowly over the rim of the latter, then creeping along the outer surface of Lt into the separator 17. When the latter is full, the water flows over the rim thereof into the funnel 21 which fills the vessel 19 from which it overflows into the channel 20 with the difference, however, that no radial flow takes place from 17 toward the rim 19 by reason of the projecting rim of the funnel The sludge Will pass down the funnel into the lower part of the vessel 19 where it will gradually rise and finally overflow the rim.

When all the parts 14-, 17 and 19 have been filled and the hopper 9 has been charged with the reduced materials, the regulating cone 7 is set revolving and adjusted by means of the nut 10 so as to supply a steady circular delivery of material onto the distributor 1.1 with a free vertical fall from the lower edge of 7 to the suitably distanced surface of 11. This free fall causes any ordinary dust to separate from the materials and thereby render the useful constituents more susceptible to the action of the water during the short transit between the spreader l3 and first separator 14. After the free fall from 7 to 11, the materials slide straight down While at the same time gradually separating laterally on the Widening surface of the cone 11. The material then falls onto the cone 13 in a well prepared condition for the preliminary moisleuing by the gentle flow of water from the holes 11 at the underside of 11. Along the cone 13 the material becomes still further separated or spread out "until it reaches the surface of the Water in the vessel 14.

The heavier particles which contain no ore fall to the bottom of the first separator 14 from Where the same can be removed through a sliding door 22. The floating ores and gangue such as quartz, which have become but little moistened down the cone 13, are driven by the radial flow of the water over the rim of 14 and slide along theexterior surface until they meet at an acute angle Z m n the water level in the separator 17. This is an important arrangement and causes the separation of the earthy matter and the lean ore, which falls to the bottom of the vessel 17, from the ore which is still dry and floats in radial direction toward and over the rim of the vessel 17 into the next vessel 21. The vessel 17 can be cleared out through a door 23.

A similar operation could be repeated by providing suitable multiplicity of vessels, but in practice it has been found that the two vessels H and 17 and the duplex overflow sutlice for all purposes. The separated ore is therefore allowed to fall into the an nular space between 1? and 21 and finally reach the bottom of the vessel 19 from which it can be withdrawn through the door The clear water ascends in the vessel 19 and finally runs oil into the channel 20.

What I claignas my invention and desire to secure by Il'tters Patent is i. In a float separator for minerals, a plurality of receptacles adapted to overflow into one another, the overflow walls being at progressively lower levels, and each overhanging the surface of liquid in the next receptacle at an angle adapted. to cause a film of liquid to flow along the overhanging surface of said wall, and means for gently feeding the material and liquid across the series of receptacles.

2. In a. float separator for minerals, a plurality of nested receptacles adapted to overflow into one another, the overflow walls being at progressively lower levels, and each overhanging the surface of liquid in the next receptacle at an angle adapted to cause a film of liquid to flow along the overhanging surface of said wall, and means for simultaneously feeding liquid and mate rial. to be separated across the series of re ceptacles.

3. In a float separator, a receptacle adapted to contain liquid and present an exposed surface thereof, means for feeding a layer of liquid and material, to be separated thereto, consisting of an overflow wall overhanging the surface of the liquid in the receptaetc, at an inclination adapted to cause the overflowing material to flow along the overhanging walls. i

4. In a float separator for minerals, aplurality of nested receptacles adapted to overflow into one another and present an cirposed surface, means for feeding alayer of liquid and material to be separated to the said. receptacle consisting of an overflow wall overhanging the surface of the liquid in the said receptacles at an inclination adapted to cause the overflowing material to flow along the overhanging walls.

In. testimony whereof I have hereunto si ned my name this 20th day of June, 1913;

in the presence of two subscribing Witnesses.

HERMANN ALEXANDER BRACKELSBERG. as

Witnesses I'iELEN Norah, l ALBERT NUFER. 

